THERMODYNAMIC DETERMINATION OF WORK FUNCTIONS OF BOUND MULTIEXCITON COMPLEXES

We present direct thermodynamic measurements of the work functions () of bound multiexciton complexes in Al-, B-, and P-doped Si. We find that the value of differs in a number of cases from those obtained by assuming ground-state to ground-state transitions for some of the lines seen in luminescence. All the measured values of are found to be less than the work function for the electron-hole liquid. © 1978 The American Physical Society.